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    <title>topic esri request with use proxy and RequestPreCallback function in Web AppBuilder Custom Widgets Questions</title>
    <link>https://community.esri.com/t5/web-appbuilder-custom-widgets-questions/esri-request-with-use-proxy-and-requestprecallback/m-p/807154#M5894</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hello&lt;/P&gt;&lt;P&gt;I need to send a request with a header Accept&amp;nbsp;"application/json;odata=verbose" because I need an answer in JSON format. I use esri request with RequestPreCallback function and it does what I need.&lt;/P&gt;&lt;PRE class="lia-code-sample line-numbers language-none"&gt;&lt;CODE&gt;&lt;SPAN class="keyword token"&gt;function&lt;/SPAN&gt; &lt;SPAN class="token function"&gt;myCallbackFunction&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;(&lt;/SPAN&gt;ioArgs&lt;SPAN class="punctuation token"&gt;)&lt;/SPAN&gt; &lt;SPAN class="punctuation token"&gt;{&lt;/SPAN&gt;
&amp;nbsp;&amp;nbsp; ioArgs&lt;SPAN class="punctuation token"&gt;.&lt;/SPAN&gt;headers&lt;SPAN class="punctuation token"&gt;.&lt;/SPAN&gt;Accept &lt;SPAN class="operator token"&gt;=&lt;/SPAN&gt; &lt;SPAN class="string token"&gt;"application/json;odata=verbose"&lt;/SPAN&gt;
&amp;nbsp;&amp;nbsp; &lt;SPAN class="keyword token"&gt;return&lt;/SPAN&gt; ioArgs&lt;SPAN class="punctuation token"&gt;;&lt;/SPAN&gt;
&lt;SPAN class="punctuation token"&gt;}&lt;/SPAN&gt;
esriRequest&lt;SPAN class="punctuation token"&gt;.&lt;/SPAN&gt;&lt;SPAN class="token function"&gt;setRequestPreCallback&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;(&lt;/SPAN&gt;myCallbackFunction&lt;SPAN class="punctuation token"&gt;)&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;;&lt;/SPAN&gt;
&lt;SPAN class="keyword token"&gt;var&lt;/SPAN&gt; requestSHP &lt;SPAN class="operator token"&gt;=&lt;/SPAN&gt; &lt;SPAN class="token function"&gt;esriRequest&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;(&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;{&lt;/SPAN&gt;
&amp;nbsp;&amp;nbsp; url&lt;SPAN class="punctuation token"&gt;:&lt;/SPAN&gt; &lt;SPAN class="string token"&gt;&lt;SPAN&gt;"&lt;/SPAN&gt;&lt;A class="jive-link-external-small" href="https://community.esri.com/external-link.jspa?url=https%3A%2F%2Fserver.domain%2F_api%2Fweb%2Flists%2FGetByTitle%28%2527AttachmentReason%2520Type%2527%29%2Fitems" target="_blank"&gt;https://server.domain/_api/web/lists/GetByTitle(%27AttachmentReason%20Type%27)/items&lt;/A&gt;&lt;SPAN&gt;"&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;,&lt;/SPAN&gt;
&amp;nbsp;&amp;nbsp; handleAs&lt;SPAN class="punctuation token"&gt;:&lt;/SPAN&gt; &lt;SPAN class="string token"&gt;"json"&lt;/SPAN&gt;
&lt;SPAN class="punctuation token"&gt;}&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;)&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;,&lt;/SPAN&gt;‍‍‍‍‍‍‍‍‍&lt;SPAN class="line-numbers-rows"&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/CODE&gt;&lt;/PRE&gt;&lt;P&gt;But when the request is send login pop up for authentication on this site is shown. I need all request to be send under one specific user so I want to use an esri proxy with domain, user and password parametrs for this site. I configured the proxy and into the code for esri request I add&amp;nbsp;&lt;/P&gt;&lt;P&gt;{&lt;BR /&gt; useProxy:false&lt;BR /&gt; }&lt;/P&gt;&lt;P&gt;parametr. But now the response from the request is in xml format so my header Accept is not honored.&amp;nbsp;&lt;/P&gt;&lt;P&gt;Can anyone help me please?&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Thanks&lt;/P&gt;&lt;P&gt;Zdenek&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Sun, 12 Dec 2021 09:25:12 GMT</pubDate>
    <dc:creator>ZdeněkSoldán</dc:creator>
    <dc:date>2021-12-12T09:25:12Z</dc:date>
    <item>
      <title>esri request with use proxy and RequestPreCallback function</title>
      <link>https://community.esri.com/t5/web-appbuilder-custom-widgets-questions/esri-request-with-use-proxy-and-requestprecallback/m-p/807154#M5894</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hello&lt;/P&gt;&lt;P&gt;I need to send a request with a header Accept&amp;nbsp;"application/json;odata=verbose" because I need an answer in JSON format. I use esri request with RequestPreCallback function and it does what I need.&lt;/P&gt;&lt;PRE class="lia-code-sample line-numbers language-none"&gt;&lt;CODE&gt;&lt;SPAN class="keyword token"&gt;function&lt;/SPAN&gt; &lt;SPAN class="token function"&gt;myCallbackFunction&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;(&lt;/SPAN&gt;ioArgs&lt;SPAN class="punctuation token"&gt;)&lt;/SPAN&gt; &lt;SPAN class="punctuation token"&gt;{&lt;/SPAN&gt;
&amp;nbsp;&amp;nbsp; ioArgs&lt;SPAN class="punctuation token"&gt;.&lt;/SPAN&gt;headers&lt;SPAN class="punctuation token"&gt;.&lt;/SPAN&gt;Accept &lt;SPAN class="operator token"&gt;=&lt;/SPAN&gt; &lt;SPAN class="string token"&gt;"application/json;odata=verbose"&lt;/SPAN&gt;
&amp;nbsp;&amp;nbsp; &lt;SPAN class="keyword token"&gt;return&lt;/SPAN&gt; ioArgs&lt;SPAN class="punctuation token"&gt;;&lt;/SPAN&gt;
&lt;SPAN class="punctuation token"&gt;}&lt;/SPAN&gt;
esriRequest&lt;SPAN class="punctuation token"&gt;.&lt;/SPAN&gt;&lt;SPAN class="token function"&gt;setRequestPreCallback&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;(&lt;/SPAN&gt;myCallbackFunction&lt;SPAN class="punctuation token"&gt;)&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;;&lt;/SPAN&gt;
&lt;SPAN class="keyword token"&gt;var&lt;/SPAN&gt; requestSHP &lt;SPAN class="operator token"&gt;=&lt;/SPAN&gt; &lt;SPAN class="token function"&gt;esriRequest&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;(&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;{&lt;/SPAN&gt;
&amp;nbsp;&amp;nbsp; url&lt;SPAN class="punctuation token"&gt;:&lt;/SPAN&gt; &lt;SPAN class="string token"&gt;&lt;SPAN&gt;"&lt;/SPAN&gt;&lt;A class="jive-link-external-small" href="https://community.esri.com/external-link.jspa?url=https%3A%2F%2Fserver.domain%2F_api%2Fweb%2Flists%2FGetByTitle%28%2527AttachmentReason%2520Type%2527%29%2Fitems" target="_blank"&gt;https://server.domain/_api/web/lists/GetByTitle(%27AttachmentReason%20Type%27)/items&lt;/A&gt;&lt;SPAN&gt;"&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;,&lt;/SPAN&gt;
&amp;nbsp;&amp;nbsp; handleAs&lt;SPAN class="punctuation token"&gt;:&lt;/SPAN&gt; &lt;SPAN class="string token"&gt;"json"&lt;/SPAN&gt;
&lt;SPAN class="punctuation token"&gt;}&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;)&lt;/SPAN&gt;&lt;SPAN class="punctuation token"&gt;,&lt;/SPAN&gt;‍‍‍‍‍‍‍‍‍&lt;SPAN class="line-numbers-rows"&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;SPAN&gt;‍&lt;/SPAN&gt;&lt;/SPAN&gt;&lt;/CODE&gt;&lt;/PRE&gt;&lt;P&gt;But when the request is send login pop up for authentication on this site is shown. I need all request to be send under one specific user so I want to use an esri proxy with domain, user and password parametrs for this site. I configured the proxy and into the code for esri request I add&amp;nbsp;&lt;/P&gt;&lt;P&gt;{&lt;BR /&gt; useProxy:false&lt;BR /&gt; }&lt;/P&gt;&lt;P&gt;parametr. But now the response from the request is in xml format so my header Accept is not honored.&amp;nbsp;&lt;/P&gt;&lt;P&gt;Can anyone help me please?&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Thanks&lt;/P&gt;&lt;P&gt;Zdenek&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Sun, 12 Dec 2021 09:25:12 GMT</pubDate>
      <guid>https://community.esri.com/t5/web-appbuilder-custom-widgets-questions/esri-request-with-use-proxy-and-requestprecallback/m-p/807154#M5894</guid>
      <dc:creator>ZdeněkSoldán</dc:creator>
      <dc:date>2021-12-12T09:25:12Z</dc:date>
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